I was thinking about making my own wort chiller. I read online Mr Palmer's instructions on how to do this, but I cannot find any copper tubing in 30-50' lengths like he describes. I went to my lowe's and home depot and they only sold either 10' lengths or sold refrigiration tubing. Besides this, everyone I have seen making them says you can make them for about $25, but the 50' refridge tubing itself was almost $30. I am totally confused and could use some direction here........Thanks so much!!